Re: Approaching the new rules from a design standpoint

From: <mkirda_at_sbcglobal.net>
Date: 17 Apr 2014 11:06:31 -0700

Hi Kang.

 At really high levels of torque, I have seen 1.5" of wash at the tips.
 The only way to stop it from tucking is to add about 1/2" of incidence (5/8" instead of 1/8"). It will launch, but flies like a pig afterwards. Not running the numbers but with a slight 1-2 degree down thrust built in, 5/8" higher at the front wing post has got to be 8 degrees or more. Add the 2 degrees down thrust and the wing is at plus 10 degrees relative to the prop shaft.
 

 Hope that is clear in what I was trying to illustrate.
 Add enough incidence and you can counteract the twist... And it will fly like a pig.
 

 Regards.
 Mike Kirda
Received on Thu Apr 17 2014 - 11:06:31 CEST